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[摘要]
目的：通过滤波技术，排除震荡电位干扰，准确测量闪光视网膜电图a波、b波的隐含期及振幅。
方法：对15例30眼门诊健康体检者行闪光视网膜电图检查，通频带为0.6～300Hz和0.6～70Hz时，分别测量a波、b波的隐含期及振幅，并进行对比分析，采用配对t检验。
结果：将通频带设置为0.6～70Hz时，a波、b波表现为单峰，对比通频带为0.6～300Hz时，a波、b波的隐含期延长，振幅下降(P<0.01)。
结论：将通频带设置为0.6～70Hz时能获得光滑的a波、b波波形，能准确测量a波、b波的隐含期及振幅。
[Key word]
[Abstract]
AIM: To accurately measure the implicit time and amplitude of a-, b-wave from flash electroretinogram(ERG)through filtering technology, eliminate oscillatory potentials interference.
METHODS: Full-field ERGs were recorded in 30 eyes of 15 physical check-ups, measured the implicit time and amplitude of a-, b-wave, when the passband was set at 0.6～300Hz and 0.6～70Hz, and correlation was performed among those results by paired t-test.
RESULTS: When the passband was set at 0.6～70Hz, a-, b-wave had a single peak, compared with the passband was set at 0.6～300Hz, the implicit time of a-, b-wave was prolonged, amplitude was decreased(P<0.01).
CONCLUSION: A passband of 0.6～70Hz was the best choice to obtain smooth a- and b-waves from the original ERG, It could accurately measure the implicit time and amplitude of a-, b-wave.
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